Comparative Pharmacology
Head-to-head clinical analysis: TESTODERM TTS versus TESTOSTERONE UNDECANOATE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: TESTODERM TTS versus TESTOSTERONE UNDECANOATE.
TESTODERM TTS vs TESTOSTERONE UNDECANOATE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Testosterone is an androgen receptor agonist. It binds to and activates androgen receptors, leading to changes in gene expression that promote the development and maintenance of male secondary sexual characteristics, anabolic effects, and spermatogenesis.
Testosterone undecanoate is a prodrug of testosterone, which binds to androgen receptors (ARs) in target tissues, leading to activation of androgen-responsive genes that promote male sexual development, maintenance of secondary sexual characteristics, and anabolic effects. It also exerts negative feedback on the hypothalamic-pituitary-gonadal axis, suppressing gonadotropin secretion.
Apply 4 mg (one 4 mg/24 hr system) or 6 mg (one 6 mg/24 hr system) transdermally once daily, applied to clean, dry, intact skin on the back, abdomen, thighs, or upper arms. Rotate application sites with an interval of at least 7 days.
1000 mg intramuscularly every 10-14 weeks, followed by a second dose at 6 weeks; maintenance 1000 mg every 10-14 weeks.
None Documented
None Documented
The terminal elimination half-life of testosterone administered transdermally is approximately 1.5–2 hours. This short half-life requires daily application of the patch to maintain therapeutic levels.
Terminal elimination half-life: 20.7 days (range 16.5–25.7 days) after intramuscular injection. This prolonged half-life is due to slow release from the oily depot in muscle. With oral administration, half-life is approximately 7–13 hours.
Testosterone is excreted primarily in the urine as glucuronide and sulfate conjugates (approximately 90%), with about 6% excreted in feces via bile. Less than 1% is excreted unchanged.
Renal (5-10% as glucuronide and sulfate conjugates, <1% as unchanged testosterone), Fecal (90% as metabolites via bile). No significant biliary excretion of active drug.
Category C
Category D/X
Androgen
Androgen